1. __________him not to do so, he wouldn’t have made such a serious mistake.
A. Did I persuade B. If I persuade
C. If I should persuade D. Had I persuaded
【答案】D
【解析】
【详解】考查虚拟条件句的省略倒装。句意：如果我说服他不这样做，他就不会犯这么严重的错误了。由主句中的wouldn't have made可知本句是对过去事实的假设，条件句中的谓语动词应用“had+过去分词”，又因在if引导的虚拟条件句中，当从句谓语动词含有had, should, were时，可将if省略，而将had, should, were置于句首，故答案为D。
